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Finding the Fourth Proportional to 17,985.60, 26,978.40 and 15,134.40

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Solution

The fourth proportional to 17,985.60, 26,978.40 and 15,134.40 is: 22,701.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,985.60 : 26,978.40 = 15,134.40 : x
  2. Step 2: Convert to fraction form
    17,985.60/26,978.40 = 15,134.40/x
  3. Step 3: Cross multiply
    17,985.60x = 26,978.40 × 15,134.40
  4. Step 4: Simplify right side
    17,985.60x = 408,301,896.96
  5. Step 5: Solve for x
    x = 408,301,896.96/17,985.60
  6. Step 6: Final answer
    x = 22,701.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.